#nav {margin: 0; padding: 0; width: 870px; height: 42px; background: url(back_nav4.gif) no-repeat; overflow: hidden; position: absolute; top: 37px; left: 0;}
#nav li {margin: 0; padding: 0; list-style: none; display: block; position: absolute;}
#nav a {display: block;}
#nav span {display: none;}
#btn1, #btn1 a, #btn2, #btn2 a, #btn3, #btn3 a, #btn5, #btn5 a, #btn4, #btn4 a, #btn6, #btn6 a {height: 42px; top: 0; background: url(back_nav4.gif) no-repeat;}
#btn1 {left: 264px; width: 64px;}
#btn2 {left: 328px; width: 123px;}
#btn3 {left: 451px; width: 97px;}
#btn4 {left: 548px; width: 81px;}
#btn5 {left: 629px; width: 133px;}
#btn6 {left: 762px; width: 92px;}
#btn1, #btn1 a {background-position: -264px 0;}
#btn2, #btn2 a {background-position: -328px 0;}
#btn3, #btn3 a {background-position: -451px 0;}
#btn4, #btn4 a {background-position: -548px 0;}
#btn5, #btn5 a {background-position: -629px 0;}
#btn6, #btn6 a {background-position: -762px 0;}
#btn1 a:hover {background-position: -264px -42px;}
#btn2 a:hover {background-position: -328px -42px;}
#btn3 a:hover {background-position: -451px -42px;}
#btn4 a:hover {background-position: -548px -42px;}
#btn5 a:hover {background-position: -629px -42px;}
#btn6 a:hover {background-position: -762px -42px;}
#btn1 a.active {background-position: -264px -84px;}
#btn2 a.active {background-position: -328px -84px;}
#btn3 a.active {background-position: -451px -84px;}
#btn4 a.active {background-position: -548px -84px;}
#btn5 a.active {background-position: -629px -84px;}
#btn6 a.active {background-position: -762px -84px;}
BODY.section-btn1 #btn1 A {BACKGROUND-POSITION: -264px -84px}
BODY.section-btn2 #btn2 A {BACKGROUND-POSITION: -328px -84px}
BODY.section-btn3 #btn3 A {BACKGROUND-POSITION: -451px -84px}
BODY.section-btn4 #btn4 A {BACKGROUND-POSITION: -548px -84px}
BODY.section-btn5 #btn5 A {BACKGROUND-POSITION: -629px -84px}
BODY.section-btn6 #btn6 A {BACKGROUND-POSITION: -762px -84px}